Loudspeaker mesh bending jig

Abstract

The utility model discloses a horn mesh bending jig which comprises an upper die and a lower die, the upper die comprises an upper die plate, an upper die base and a plurality of bending slotting tools, the bottom face of the upper die plate is provided with a concave cavity, the upper die base is connected to the upper end of the upper die plate through an elastic piece, and the bending slotting tools are arranged on the upper die base, can penetrate through the upper die plate and are used for surrounding the periphery of the concave cavity. The lower die comprises a lower die plate, a male die core arranged on the lower die plate and matched with the concave cavity, a plurality of side pushing blocks arranged on the lower die plate, distributed around the male die core and in one-to-one correspondence with the bending slotting tools in position, and a material ejecting piece arranged in the male die core in a penetrating mode and capable of moving up and down. The lower die base is arranged at the lower end of the lower die plate, the first driving unit is arranged on the lower die base and used for driving the material jacking part to move, the side pushing blocks correspond to the positions of the buckles of the workpieces one to one, after die assembly, the bending slotting tool drives the side pushing blocks to bend the buckles, and after bending is completed, the material jacking part jacks the workpieces for a certain distance, and the first driving unit drives the side pushing blocks to move. And the side pushing block continuously bends the buckle, so that the bending processing is more thorough, and the connection is tighter.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic component processing, and particularly relates to a speaker mesh bending jig. Background Art

[0002] Speaker meshes protect speakers from dust and damage, and adjust high-frequency tones. These meshes are typically formed by pressing metal and plastic components together. The edges of the metal components are fitted with several clips, which need to be bent to secure the metal and plastic components together more tightly, preventing them from loosening or falling apart. Traditional bending jigs, when bending the clips, can cause the metal to rebound after the external force is removed due to the elasticity of the metal. This can cause the metal clips to not fit tightly enough with the plastic component, potentially leading to loosening or falling apart. Utility Model Content

[0003] In view of the technical problem in the prior art that when bending the buckle, after the external force is removed, the buckle of the metal part is prone to rebound due to elastic deformation, resulting in the metal buckle and the plastic part not being pressed tightly enough, the utility model provides a speaker mesh bending jig.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A speaker mesh bending jig, comprising:

[0006] An upper die, the upper die comprising an upper die plate having a recessed cavity on its bottom surface, an upper die base connected to an upper end of the upper die plate via an elastic member, and a plurality of bending inserts provided on the upper die base and capable of passing through the upper die plate to surround the recessed cavity;

[0007] a lower die, which cooperates with the upper die and is located below the upper die, the lower die comprising a lower die plate, a punch core provided on the lower die plate and adapted to the recessed cavity, a plurality of side push blocks provided on the lower die plate and distributed around the punch core and corresponding to the positions of the bending inserts, a ejector member which passes through the punch core and can reciprocate along the height direction of the punch core, a lower die base provided at the lower end of the lower die plate, and a first driving unit provided on the lower die base and connected to the ejector member for driving the ejector member to move, wherein the plurality of side push blocks correspond to the workpiece clamping positions one by one;

[0008] After the mold is closed, the bending insert can drive the side push block to move toward the punch core until the buckle of the workpiece is bent, and the first driving unit can drive the ejecting member to lift the workpiece away from the punch core.

[0009] Furthermore, the lower portion of all the bending blades has a blade bevel surface that cooperates with the side push block.

[0010] Furthermore, the upper mold base includes a top plate, a plurality of guide columns arranged at the lower end of the top plate and located at various corners of the top plate, and a plurality of first contour sleeves arranged at the lower end of the top plate and distributed one-to-one correspondingly adjacent to the guide columns. The upper mold plate is provided with a plurality of guide sleeves that can one-to-one correspond to the guide columns.

[0011] Furthermore, the elastic member is a plurality of first springs arranged between the top plate and the upper template.

[0012] Furthermore, each of the side push blocks includes a push block body and a push rod connected to one side of the push block body, the width of the push block body is greater than the width of the push rod, the first end of the push block body is provided with a push block bevel surface that matches the bevel surface of the inserting knife, and the other opposite end is fixedly connected to the push rod, and the non-fixed push rod is provided with an avoidance notch for avoiding the ejecting member.

[0013] Furthermore, each of the side push blocks is detachably connected to the lower template through a guide mechanism, and the guide mechanism includes a mounting groove provided on the lower template, a guide block installed in the mounting groove by bolts, an L-shaped assembly position provided on the guide block for assembling the side push block, a through cavity provided on the vertical surface of the L-shaped assembly position and horizontally penetrating the vertical surface for the non-fixed end of the push rod to pass through, and two second springs, the horizontal surface of the L-shaped assembly position is against the bottom surface of the push block body, and the two second springs are respectively located on both sides of the push rod, one end of the second spring is connected to the vertical surface and the other opposite end is connected to the side wall of the push block body.

[0014] Furthermore, the punch core is provided with a plurality of recessed positions for assembling the ejecting piece, the ejecting piece can move back and forth in the recessed positions, and each of the recessed positions corresponds to a position of the push rod. When the push rod moves toward the recessed position to bend the buckle, the top end of the ejecting piece can pass through the avoidance gap to lift the workpiece.

[0015] Furthermore, the lower mold base includes a bottom plate, two side plates arranged at the upper end of the bottom plate and connected to the upper mold plate at the upper end and arranged at intervals, and a movable plate arranged between the two side plates and connected to the bottom of the lower mold plate through the first driving unit. The bottom ends of all the ejecting parts pass through the punch core and the lower mold plate and are connected to the upper end of the movable plate. The first driving unit can drive the movable plate to move back and forth in the direction of approaching or moving away from the lower mold plate.

[0016] Furthermore, each of the two side panels is provided with a through cavity penetrating the side panels.

[0017] Furthermore, a stripping mechanism is installed on the movable plate for lifting the workpiece after the mold is opened so that the workpiece can be separated from the punch core. The stripping mechanism includes a mounting cavity vertically passing through the movable plate, a stripping plate arranged in the mounting cavity and adapted to the mounting cavity, a plurality of ejecting pins arranged on the stripping plate, a plurality of second equal-height sleeves arranged on the stripping plate, and a second driving unit arranged between the stripping plate and the bottom plate. The second driving unit can drive the stripping plate to move back and forth in a direction close to or away from the lower mold plate, so that the ejecting pin can lift the workpiece after passing through the lower mold plate and the punch core after the mold is opened.

[0018] In summary, the beneficial effects of the present invention are: 1. By utilizing the cooperation of the upper die and the lower die, the buckle can be automatically bent, which saves manpower and time and improves work efficiency. 2. After the mold is closed, the bending insert drives the side push block to move horizontally to bend the buckle of the workpiece. After the bending is completed, the first drive unit drives the ejector to move upward to lift the workpiece for a distance, so that the tail of the buckle, which is prone to rebound, contacts the side push block and continues to be pushed inward by the side push block, further bending the buckle, and making the bending forming more thorough to prevent the metal buckle from rebounding due to elasticity, thereby becoming loose or falling off. 3. After the mold is opened, the second drive unit drives the stripper plate to move, so that the ejector pin moves upward to lift the workpiece, allowing the workpiece to be easily separated from the punch core, making it convenient to remove the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a speaker mesh bending jig provided by the utility model.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the upper mold in the utility model.

[0021] Figure 3 It is a structural diagram of the connection between the side push block and the guide block in the utility model.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the middle and lower molds of the utility model.

[0023] Figure 5 yes Figure 4 Schematic diagram of the structure with workpieces loaded.

[0024] Figure 6 yes Figure 5 A partial enlarged view of part A in the middle.

[0025] Figure 7 It is a structural diagram of the workpiece to be processed by this fixture.

[0026] Figure 8 It is a structural schematic diagram of the stripping plate in the utility model.

[0027] In the figure, 100-upper die, 110-upper template, 111-recessed cavity, 112-guide sleeve, 120-elastic member, 130-upper die seat, 131-top plate, 132-guide column, 133-first level set, 140-bending insert, 141-insertion insert oblique surface, 200-lower die, 210-lower template, 220-punch core, 221-recessed position, 230-side push block, 231-push block body, 2310-push block oblique Chisel surface, 232-push rod, 2320-avoidance gap, 240-ejector, 250-lower die base, 251-bottom plate, 252-side plate, 2520-through cavity, 253-movable plate, 260-first drive unit, 300-guide block, 310-second spring, 400-workpiece, 410-metal part, 411-clip, 420-plastic part, 500-stripper plate, 510-ejector pin, 520-second drive unit. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to specific drawings.

[0029] See also Figure 7 The speaker net is hereinafter referred to as the workpiece 400. The workpiece 400 includes a plastic part 420 and a metal part 410 pressed onto the outside of the plastic part 420. Each metal part 410 has a plurality of clips 411 on its edge. The clips 411 need to be bent inward so as to be pressed together with the plastic part 420.

[0030] See also Figure 1 The present invention provides a speaker grille bending jig, comprising an upper die 100 and a lower die 200 that cooperates with the upper die 100 and is located below the upper die 100. Figure 2 The upper die 100 includes an upper die plate 110 with a recessed cavity 111 on its bottom surface, an upper die base 130 connected to the upper end of the upper die plate 110 via an elastic member 120, and a plurality of bending inserts 140 provided on the upper die base 130 and capable of passing through the upper die plate 110 to surround the recessed cavity 111. The shape of the recessed cavity 111 is adapted to the shape of the workpiece 400. Figure 4 The lower mold 200 includes a lower mold plate 210, a punch core 220 provided on the lower mold plate 210 and adapted to the recessed mold cavity 111, a plurality of side push blocks 230 provided on the lower mold plate 210 and distributed around the punch core 220 and corresponding to the positions of the bending inserts 140, a ejector 240 passing through the punch core 220 and capable of reciprocating along the height direction of the punch core 220, a lower mold base 250 provided at the lower end of the lower mold plate 210, and a first driving unit 260 provided on the lower mold base 250 and connected to the ejector 240 for driving the ejector 240 to move. Figure 6 , several side push blocks 230 correspond to the positions of the buckles 411 of the workpiece 400. After the mold is closed, the bending insert 140 can drive the side push blocks 230 to move toward the punch core 220 until the buckles 411 of the workpiece 400 are bent. The first driving unit 260 can drive the ejector 240 to lift the workpiece 400 away from the punch core 220. Figure 5 , the workpiece 400 to be bent is loaded on the punch core 220, and after the upper mold 100 moves downward to close the mold, the bending insert 140 moves downward until it contacts the side push block 230, thereby driving the side push block 230 to move toward the buckle 411 until the side push block 230 contacts the buckle 411 and bends the buckle 411. After the bending is completed, the first driving unit 260 drives the lifting member 240 to lift the workpiece 400 upward for a distance. The side push block 230 can still continue to move under the drive of the bending insert 140 to further bend the buckle 411, so that the tail of the metal buckle 411, which is prone to rebound, can be bent more thoroughly, thereby making it more tightly connected to the plastic part 420 and less likely to loosen or slip.

[0031] The upper die holder 130 includes a top plate 131, a plurality of guide posts 132 disposed at the lower end of the top plate 131 and located at the corners of the top plate 131, and a plurality of first contour sleeves 133 disposed at the lower end of the top plate 131 and corresponding to the adjacent guide posts 132. The upper die plate 110 is provided with a plurality of guide sleeves 112 that can be fitted one-to-one into the guide posts 132. The elastic members 120 are a plurality of first springs disposed between the top plate 131 and the upper die plate 110. During mold closing, the side push block 230 is driven by the continuous downward movement of the top plate 131, driving the bending blade 140 into contact with the side push block 230. The first springs are compressed. After the mold is opened, the first springs return to their original position, restoring the upper die 100 to its unclosed state for ease of use in the next process. The guide posts 132 cooperate with the guide sleeves 112 to guide the top plate 131 for smoother movement.

[0032] Please continue reading Figure 2Each bending blade 140 has a blade beveled surface 141 at its lower portion that mates with the side push block 230. Each side push block 230 includes a push block body 231 and a push rod 232 connected to one side of the push block body 231. The push block body 231 is wider than the push rod 232. A push block beveled surface 2310 is provided at the first end of the push block body 231 to mate with the blade beveled surface 141. The opposite end of the push rod 232 is fixedly connected to the push rod 232. The engagement of the blade beveled surface 141 with the push block beveled surface 2310 pushes the side push block 230 horizontally toward the buckle 411, thereby bending the buckle 411. When the lower mold 200 is in the initial state before the mold is closed, in order to avoid interference from the ejecting piece 240, the top of the ejecting piece 240 is away from the top of the punch core 220. However, when the ejecting piece 240 needs to move upward to lift the workpiece 400, in order to avoid interference between the ejecting piece 240 and the push rod 232, the push rod 232 is non-fixed and has an avoidance notch 2320 for avoiding the ejecting piece 240, so that the ejecting piece 240 can move upward smoothly to lift the workpiece 400.

[0033] See also Figure 3 and Figure 4 Each side push block 230 is detachably connected to the lower mold plate 210 via a guide mechanism. The guide mechanism includes a mounting slot defined in the lower mold plate 210, a guide block 300 bolted into the mounting slot, an L-shaped mounting position on the guide block 300 for mounting the side push block 230, a through-hole provided on the vertical surface of the L-shaped mounting position and extending horizontally through the vertical surface for passage of the non-fixed end of the push rod 232, and two second springs 310. The horizontal surface of the L-shaped mounting position abuts the bottom surface of the push block body 231. The two second springs 310 are located on either side of the push rod 232, one end of each second spring 310 connected to the vertical surface and the other, opposite end connected to the side wall of the push block body 231. When the insert knife bevel surface 141 cooperates with the push block bevel surface 2310, the push block body 231 moves horizontally in the L-shaped assembly position. When the push rod 232 approaches the buckle 411, the second spring 310 is in a compressed state. After the mold is opened, the second spring 310 drives the side push block 230 to return to its original position.

[0034] Please continue reading Figure 4The punch core 220 is provided with a number of recessed positions 221 for assembling the ejecting piece 240. The ejecting piece 240 can move back and forth in the recessed positions 221, and each recessed position 221 corresponds to the position of a push rod 232. When the push rod 232 moves toward the recessed position 221 to bend the buckle 411, the top end of the ejecting piece 240 can pass through the avoidance gap 2320 to lift the workpiece 400. The push rod 232 is pushed into the recessed position 221 to bend the buckle 411 inward. When the mold is not opened, the first drive unit 260 is started. During the upward movement of the ejecting member 240, it passes through the avoidance gap 2320 to lift the workpiece 400. The lifting action of the ejecting member 240 is local. It will only lift the workpiece 400 for a certain distance. The side push block 230 continues to bend the buckle 411, thereby continuing to bend the part of the tail of the buckle 411 that is prone to rebound. The bending is more thorough, and the metal part 410 and the plastic part 420 are more tightly connected.

[0035] The lower die base 250 includes a base plate 251, two side plates 252 disposed at the upper end of the base plate 251 and connected to the upper die plate 110 at their upper ends and spaced apart from each other, and a movable plate 253 disposed between the two side plates 252 and connected to the lower die plate 210 via a first drive unit 260. The bottom ends of all ejecting members 240 pass through the punch core 220 and the lower die plate 210 and are connected to the upper end of the movable plate 253. The first drive unit 260 is capable of driving the movable plate 253 to reciprocate toward or away from the lower die plate 210. The first drive unit 260 is preferably a pneumatic cylinder. The first drive unit 260 drives the movable plate 253 upward toward the lower die plate 210, thereby enabling the ejecting members 240 to move from a position away from the top of the punch core 220 to a position close to the top of the punch core 220 until the workpiece 400 is lifted a certain distance.

[0036] See also Figure 8 A stripping mechanism is installed on the movable plate 253 for lifting the workpiece 400 after the mold is opened so that the workpiece 400 can be separated from the punch core 220. The stripping mechanism includes a mounting cavity vertically passing through the movable plate 253, a stripping plate 500 arranged in the mounting cavity and adapted to the mounting cavity, a plurality of ejecting pins 510 arranged on the stripping plate 500, a plurality of second contour sleeves arranged on the stripping plate 500, and a second driving unit 520 arranged between the stripping plate 500 and the bottom plate 251. The second driving unit 520 can drive the stripping plate 500 to move back and forth in a direction close to or away from the lower mold plate 210, so that the ejecting pin 510 can lift the workpiece 400 after passing through the lower mold plate 200 and the punch core 220 after the mold is opened. The second driving unit 520 preferably adopts a cylinder. After the mold is opened, the second driving unit 520 can drive the stripping plate 500 to move in the installation cavity, so that the ejection pin 510 moves up and contacts the workpiece 400 to lift the workpiece 400, thereby facilitating the separation of the workpiece 400 with the necking structure and the punch core 220 to complete the stripping.

[0037] The two side plates 252 are each provided with a through cavity 2520 penetrating the side plates 252 , which facilitates handling when transferring, transporting or installing the jig.

[0038] This bending jig: 1. By using the upper mold 100 and the lower mold 200 together, the buckle 411 can be automatically bent, saving manpower and time, and improving work efficiency. 2. After the mold is closed, the bending insert 140 drives the side push block 230 to move horizontally to bend the buckle 411 of the workpiece 400. After the bending is completed, the first drive unit 260 drives the ejector 240 to move upward to lift the workpiece 400 for a distance, so that the tail of the buckle 411 that is prone to rebound contacts the side push block 230 and continues to be pushed inward by the side push block 230, further bending the buckle 411, and making the bending more thorough to prevent the metal buckle 411 from rebounding due to elasticity, thereby becoming loose or falling off. 3. After the mold is opened, the second drive unit 520 drives the stripper plate 500 to move, so that the ejector pin 510 moves upward to lift the workpiece 400, allowing the workpiece 400 to be easily separated from the punch core 220, making it convenient to remove the workpiece 400.

[0039] The above is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure made using the contents of the description and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present invention.

Claims

1. A speaker mesh bending jig, characterized in that: include: An upper die, the upper die comprising an upper die plate having a recessed cavity on its bottom surface, an upper die base connected to an upper end of the upper die plate via an elastic member, and a plurality of bending inserts provided on the upper die base and capable of passing through the upper die plate to surround the recessed cavity; a lower die, which cooperates with the upper die and is located below the upper die, the lower die comprising a lower die plate, a punch core provided on the lower die plate and adapted to the recessed cavity, a plurality of side push blocks provided on the lower die plate and distributed around the punch core and corresponding to the positions of the bending inserts, a ejector member which passes through the punch core and can reciprocate along the height direction of the punch core, a lower die base provided at the lower end of the lower die plate, and a first driving unit provided on the lower die base and connected to the ejector member for driving the ejector member to move, wherein the plurality of side push blocks correspond to the workpiece clamping positions one by one; After the mold is closed, the bending insert can drive the side push block to move toward the punch core until the buckle of the workpiece is bent, and the first driving unit can drive the ejecting member to lift the workpiece away from the punch core.

2. The speaker mesh bending jig according to claim 1, characterized in that: The lower part of all the bending inserts has an insert bevel surface which cooperates with the side push block.

3. The speaker mesh bending jig according to claim 2, characterized in that: The upper mold base includes a top plate, a plurality of guide columns arranged at the lower end of the top plate and located at the corners of the top plate, and a plurality of first contour sleeves arranged at the lower end of the top plate and distributed one-to-one correspondingly adjacent to the guide columns. The upper mold plate is provided with a plurality of guide sleeves that can one-to-one correspond to the guide columns.

4. The speaker mesh bending jig according to claim 3, characterized in that: The elastic members are a plurality of first springs arranged between the top plate and the upper template.

5. The speaker mesh bending jig according to claim 2, characterized in that: Each of the side push blocks includes a push block body and a push rod connected to one side of the push block body. The width of the push block body is greater than the width of the push rod. The first end of the push block body is provided with a push block bevel surface that matches the bevel surface of the inserting knife, and the other opposite end is fixedly connected to the push rod. The push rod is non-fixed and has an avoidance notch for avoiding the ejecting member.

6. The speaker mesh bending jig according to claim 5, characterized in that: Each of the side push blocks is detachably connected to the lower template through a guide mechanism, and the guide mechanism includes a mounting groove provided on the lower template, a guide block installed in the mounting groove by bolts, an L-shaped assembly position provided on the guide block for assembling the side push block, a through cavity provided on the vertical surface of the L-shaped assembly position and horizontally penetrating the vertical surface for the non-fixed end of the push rod to pass through, and two second springs, the horizontal surface of the L-shaped assembly position is against the bottom surface of the push block body, and the two second springs are respectively located on both sides of the push rod, one end of the second spring is connected to the vertical surface and the other opposite end is connected to the side wall of the push block body.

7. The speaker mesh bending jig according to claim 5, characterized in that: The punch core is provided with a plurality of recessed positions for assembling the ejecting piece, and the ejecting piece can move back and forth in the recessed positions, and each of the recessed positions corresponds to a position of the push rod. When the push rod moves toward the recessed position to bend the buckle, the top end of the ejecting piece can pass through the avoidance gap to lift the workpiece.

8. The speaker mesh bending jig according to claim 1, characterized in that: The lower mold base includes a bottom plate, two side plates arranged at the upper end of the bottom plate and connected to the upper mold plate at the upper end and arranged at intervals, and a movable plate arranged between the two side plates and connected to the bottom of the lower mold plate through the first driving unit. The bottom ends of all the ejecting parts pass through the punch core and the lower mold plate and are connected to the upper end of the movable plate. The first driving unit can drive the movable plate to move back and forth in the direction of approaching or moving away from the lower mold plate.

9. The speaker mesh bending jig according to claim 8, characterized in that: A through cavity penetrating the side plates is provided on the two side plates.

10. The speaker mesh bending jig according to claim 8, characterized in that: A stripping mechanism is installed on the movable plate for lifting the workpiece after the mold is opened so that the workpiece can be separated from the punch core. The stripping mechanism includes a mounting cavity that vertically passes through the movable plate, a stripping plate arranged in the mounting cavity and adapted to the mounting cavity, a plurality of ejecting pins arranged on the stripping plate, a plurality of second equal-height sleeves arranged on the stripping plate, and a second driving unit arranged between the stripping plate and the bottom plate. The second driving unit can drive the stripping plate to move back and forth in a direction close to or away from the lower mold plate, so that the ejecting pin can lift the workpiece after passing through the lower mold plate and the punch core after the mold is opened.

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